Which aleph for the bass and mids? - diyAudio
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Old 29th November 2002, 06:22 PM   #1
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Default Which aleph for the bass and mids?

Which aleph amp is the best choise in a bi-amping system for bass and mids? Frequency range (40 - 1000 Hz); Output power/ch about 60-80 watts.

I think a good choise could be the aleph 5, but it has an damping factor of only 50.
The aleph 60 has a damping faktor of 100 and so more control for the bass.

Or an alephX? output power? damping faktor?


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Old 29th November 2002, 06:32 PM   #2
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The bigger the Aleph, the better the bottom.

Also, I wouldn't go by damping factor if I were you. I have
too many examples of high vs low DF examples where the
low had better control of the bass. Go figure.

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Old 30th November 2002, 09:13 PM   #3
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A friend (an engineer in electronics) used PSpice to analyse the Aleph5 design. According to his calculations the damping factor is
at 8Ohm load:
100Hz: 266
1000Hz: 266
10000Hz: 140
20000Hz: 80
Is that all there is?
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Old 30th November 2002, 10:40 PM   #4
xcel is offline xcel  Netherlands
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The bigger the Aleph, the better the bottom
What are the arguments for this compelling statement, Nelson ? Is it the amount of available output current, or output resistance....Please elaborate.


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Old 30th November 2002, 11:26 PM   #5
djk is offline djk
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Damping factor is a virtually meaningless specification as regards bass quality.

If an amplifier has an output impedance of 0R05 it is said to have a DF of 160.

So what?

A typical 8R speaker will have a DCR of 5R, and the inductor in series with the woofer will add another 0R5, for a total of 5R55 (adding amplifier output impedance but neglecting any connecting wire).

If the amplifier had a DF of infinity the motional (generator) voltage of the speaker would still have 5R5 in series with it. And still 5R if bi-amped.

I own a transformer coupled amplifier with a DF of 14. It is much 'tighter' in the bass with much more 'slam' than amplifiers with DF in the range of 400 and UP.
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Old 22nd July 2008, 06:25 PM   #6
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Could you give me the damping factor of the AlephX ?

thanks in advance
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